简单问题--随机码

Question

请问生成一个8位的随机码。随机码为数字和字母混合组成！

Answer 1

//产生随机字符串
    private string GenCode(int num)
    {
        string[] source={"0","1","2","3","4","5","6","7","8","9",
                         "A","B","C","D","E","F","G","H","I","J","K","L","M",
                         "N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
        string code="";
        Random rd=new Random();
        for(int i=0;i < num;i++)
        {
            code += source[rd.Next(0,source.Length)];
        }
        return code;
    }